Q: Is 431,640 a Prime Number?
A: No, 431,640 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 431640 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 30 33 36 40 44 45 55 60 66 72 88 90 99 109 110 120 132 165 180 198 218 220 264 327 330 360 396 436 440 495 545 654 660 792 872 981 990 1,090 1,199 1,308 1,320 1,635 1,962 1,980 2,180 2,398 2,616 3,270 3,597 3,924 3,960 4,360 4,796 4,905 5,995 6,540 7,194 7,848 9,592 9,810 10,791 11,990 13,080 14,388 17,985 19,620 21,582 23,980 28,776 35,970 39,240 43,164 47,960 53,955 71,940 86,328 107,910 143,880 215,820 and 431,640, with no remainder.
Since 431,640 cannot be divided by just 1 and 431,640, it is not a prime number.